While previous research has linked excessive sedentary time to an increased risk of death, numerous studies relied on people to accurately recall and report how much they moved around and might not have painted a clear picture of the relationship between mortality and inactivity.

Diaz also took notice of the reality that several individuals are sitting for up to 10 hours daily. Beware, it may raise the risk of dying early than people who sit cumulatively for the same time, but in shorter bouts, a study has warned.

Researchers from Columbia University studied 7,985 adults who were over the age of 45.

The activity of each adult was assessed using a hip-mounted accelerometer, and the team used this information to calculate the how long participants spent sedentary in individual bouts, as well as the total time spent sedentary each day.

Asked if, say, a standing desk might be helpful for those who work desk jobs, Diaz said "there is limited evidence to suggest that standing is a healthier alternative to sitting".

When researchers measured the "bout length" of subjects' sitting spells, they found that 52% lasted less than a half-hour, 22% lasted between a half-hour and just under an hour, 14% lasted 60 to 89 minutes and 14% went on for more than 90 minutes.

The finding that a workout will not undo the harms caused by prolonged sitting is unsurprising, Levine added. But for every 30 minutes of sedentary time, the researchers found that the likelihood of death among the study participants increased by about 19 percent.

The study also wasn't a controlled experiment created to prove how or whether sedentary time directly causes premature death.

Inactive adults who spend more time on sitting at one place have more risk of premature death than people who don't sit around a lot, US study suggests.

"Observational studies, no matter how well designed, can not imply causality", University of Toronto cardiologist Dr. David A. Alter warned in an editorial.

Previous studies have ventured to measure the effect of sedentary time on negative health results, many depend on self-reported data.

Based on their results, they suggest that current physical activity guidelines should be adjusted to include recommendations that target and reduce long periods of sedentary behavior. So although standing desks are becoming more and more popular, until better scientific studies are published, I would encourage people who are concerned about their sedentary habits to take movement breaks as often as possible.

It's not just about avoiding sedentary behavior or prolonged bouts of sedentary behavior, said Alter, who wrote an accompanying journal editorial. In addition to it, the new research says that not only the total length of the time one spends in sitting is risky, but also the duration of continue sitting at single place without break can cause the sever problems.

"If we are to sit for prolonged periods at a time - more than 30 minutes at a time, and for many hours per day - more than 12 hours per day, our risk of death is high", Alter said. The average was 11 minutes at a stretch.

During the study, 340 people died after an average follow-up of four years.

"That risk is reduced if we exercise at least 150 minutes per week, but not entirely eliminated", he concluded.

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